【摘要】 光折变效应在全息存储和处理方面具有重要的应用价值，光折变晶体中的全息光栅特性直接影响信息处理的质量和速度.本实验通过理论分析，计算得出Raman-Nath平面光栅的制作参量，设计实验系统并测量了LiNbO₃晶体中平面光栅的多级衍射性质，讨论了多级衍射效率和其空间分布特征.实验设计基于学生的光学知识和实验技能，向非线性光学知识和科学思辨创新方法拓展，在可调光分束器、图像处理等方面具有潜在的应用价值.更多还原

【Abstract】 Photorefractive effect shows the great application value in holographic storage and information process. The quality and speed of information processing are affected by the characteristics of holographic gratings directly. Volume Bragg grating is an extensive form for photorefractive holographic storage. In this experiment, the fabrication parameters of Raman-Nath grating were provided by theoretical calculation. The experiment setup was designed and the higher-order diffraction properties of the plane grating were investigated experimentally in lithium niobate crystal. This had potential application in adjustable beam splitter and optical image processing. This experiment could expand the students’ knowledge of nonlinear optics, train their experimental skills of complicated optical system, enable their scientific critical thinking and scientific innovation ability.更多还原